Gold plique a jour pieces that are genuinely of the period are not easy to find. They have been widely copied, and are quite crude. This piece has the soft quality of the real thing, and the subject is typically Art Nouveau. Plique a jour is a type of enamelling that really tested the artist ,as the enamel is not painted on a surface and fired. Instead it has no backing, hence the term "seen by day" as it is transparent when held to the light.